The Holland midfielder had been struggling with sickness in the 48 hours leading up to Saturday's match, resulting in being ordered by the doctor to stay away from the team hotel the night before the game.
The Liverpool Echo rated his performance eight out of 10, writing: "Tried so hard to affect play in the first half and come into his own after the break, a brilliant pass helping fashion the third and his pressing, positioning and distribution much improved". "It was a tablet that could induce stomach pains", said Wijnaldum, was named man of the match. I took it and I had a pain and thought it was from the tablet. And I certainly don't see many defences keeping them quiet at the other end.
"The manager called me and said 'do you think you can play?'". In the morning I was still weak and had diarrhoea. I was like 'Oh no!'. "At half-time I thought: "Oh no" but I ran inside and managed to control it!"
However, what was more important was getting back to winning ways after back-to-back 1-1 draws against the Hammers and Leicester had left critics questioning their mettle for a fight.
"We had two draws in a row and that didn't feel that good", he added. It is hard [competing with City] but we already knew from the beginning that it would be hard.
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"That's what we wanted to show, that we are a team who are able to play really good football but if we lose the ball we must be different to all teams in the world".
"You can see the improvement". However, the Championship has seen a mammoth 985 goals this so far this season, with Sheffield United's Billy Sharp racking up 22 goals and Norwich's Teemu Pukki scoring 20!.
Wijnaldum, who cost Liverpool a reported £22 million (RM115.6 million) when he signed from Newcastle in 2016, is optimistic they can cope with competing on two fronts. He is just trying to get us going and it's obviously worked.
"Well, in Liverpool they have two Dutch players of course, so for me Liverpool can win the title", he said on Sky Sports. In that time Neville has won eight Premier League titles for Manchester United and knows what it takes to come out on top in a tense title race.